Important Paper Electrical Engineering
1. Hot wire ammeter are used for measuring :
(1) only a.c.
(2) only d.c.
(3) neither a.c. nor d.c.
(4)both a.c. and d.c.
Ans (4)
2. Which of the following meters is an integrating type instrument?
(1) Ammeter
(2)Voltmeter
(3) Wattmeter
(4) Energy meter
Ans (4)
3. Which of the following instruments is an integrating type instrument ?
(1) Wattmeter
(2)Energy Meter
(3) Power Factor Meter
(4)None of the above
Ans (2)
4. An electrodynamometer type of instruments finds its major use as
(1) standard instrument only
(2) transfer instrument only
(3) Both as or standard and transfer instruments
(4) an indicator type of instrument
Ans (3)
5. Electrostatic instruments are used for measuring
(1)AC and DC voltage
(2) AC voltage and current
(3)DC voltage and current
(4) AC and DC currents
Ans (1)
6. Electrostatic instruments are suitable for the measurement of :
(1) ac and dc voltages
(2) ac voltage and current
(3) dc voltage and current
(4) ac and dc current
Ans (1)
7. Rectifier type instrument can be use in-
(1) a. c.
(2) d.c.
(3) Both (1) and (2)
(4) Pulsating
Ans (1)
8. Dynamometer type of instrument can use in -
(1) a.c.
(2)d.c.
(3) (1) & (2) both
(4) Pulsating
Ans (3)
9. Which of the following instruments is equally accurate on ac as well as dc circuits ?
(1) PMMC voltmeter
(2) Dynmometer wattmeter
(3) Moving iron ammeter
(4) Induction wattmeter
Ans (2)
10. Which one of the following types of instruments does suffer from error due to megnetic hysteresis ?
(1) Induction type
(2) Electrodynamics
(3) Moving Iron
(4) PMMC
Ans (3)
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